1516 渦電流探傷法によるCFRP積層板の層間はく離検出(S10-3 非破壊評価とモニタリングIII,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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Carbon fiber reinforced plastic (CFRP) laminates are very sensitive to an impact which causes delaminations in the laminate. Since delamination reduces the mechanical property of the laminate, nondestructive inspection is required to maintain the structural reliability of the CFRP structure. Eddy current test (ECT) has been studied to be applied to CFRP laminate. Strong electric anisotropy, however, makes application of the method difficult. Since delamination is in-plane damage in the laminate, conventional ECT has a problem for making current-loop which should be impeded by the damage to be detected. In the present paper, rectangular twin probe for electrically anisotropic CFRP laminate is introduced to resolve the problems. The probe is made of two rectangular coils put side-by-side to induce strong uniform electric current. Delamination was made in CFRP cross-ply laminates by means of the indentation test; the applicability of the ECT with rectangular twin probe is examined experimentally.
社団法人日本機械学会の論文
2008-08-02